/*
 * #%L
 * Bind Text Field with Presenter
 * $Id:$
 * $HeadURL:$
 * %%
 * Copyright (C) 2012 - 2015 Java Creed
 * %%
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * #L%
 */
package com.javacreed.examples.swing;

import java.util.Objects;

import javax.swing.JComponent;

public abstract class AbstractBinder<T extends JComponent> {

  private T component;

  public T attach(final T component) {
    this.component = Objects.requireNonNull(component);
    return component;
  }

  protected T failIfNotAttached() {
    if (component == null) {
      throw new NotAttachedException();
    }

    return component;
  }

  protected T getComponent() {
    return component;
  }

  public boolean isAttached() {
    return component != null;
  }

}
